public override DataTable GetSchema(string collection)
{
return(ConnectionPrimary?.State == ConnectionState.Open
? ConnectionPrimary.GetSchema(collection)
: ConnectionSecondary?.State == ConnectionState.Open
? ConnectionSecondary.GetSchema(collection)
: null);
}
public override void Open()
{
if (ConnectionPrimary != null)
{
TimeSpan timeout = TimeSpan.FromSeconds(60);
_idleTimeTimerPrimary = new Timer(_idleTimeTimerCallback, ConnectionPrimary, timeout, timeout);
try
{
ConnectionPrimary.Open();
}
catch
{
StateRedundant = _stateRedundant | ConnectionStateRedundant.BrokenPrimary;
_tryOpenSecondary();
if (ConnectionSecondary == null || ConnectionSecondary.State != ConnectionState.Open)
{
throw;
}
}
}
_tryOpenSecondary();
}
public override void Close()
{
if (ConnectionPrimary != null)
{
lock (ConnectionPrimary)
{
_idleTimeTimerPrimary.Dispose();
_idleTimeTimerPrimary = null;
ConnectionPrimary.Close();
ConnectionPrimary.StateChange -= _connection_StateChange;
}
}
if (ConnectionSecondary != null)
{
lock (ConnectionSecondary)
{
_idleTimeTimerSecondary.Dispose();
_idleTimeTimerSecondary = null;
ConnectionSecondary.Close();
ConnectionSecondary.StateChange -= _connection_StateChange;
}
}
}
